Testing The Regulator - 3M SCOTT AIR-PAK X3 PRO Inspection & Cleaning Instructions

INSPECTING THE RESPIRATOR
6 Fully depress the center of the air saver/donning switch on the top of the E-Z Flo+ regulator or firmly pull the
auto air-saver switch on the E-Z Flo C5 regulator latch and release. The flow of air from the facepiece will stop.
7 Examine the complete respirator for air leaks. No air should leak from any part of the respirator.
.
WARNING
An air leak from a respirator may indicate a potentially serious defect. An air leak may reduce the duration of
use and/or the time remaining after an end-of-service alarm actuates, or it may prevent an end-of-service
alarm from properly actuating. Using a respirator with an air leak may expose you to dangerous conditions,
which could lead to serious injury or death.

Testing the Regulator

The regulator is equipped with a red purge valve (knob), which allows air to flow into the facepiece in an emergency
without breathing on the respirator. The purge control is also used to release residual air from the respirator after the
cylinder valve is turned off.
To check the purge valve
1 Rotate the purge valve one-half turn counterclockwise (turn the valve so that the pointer on the knob points
down). Air flows freely from the regulator.
2 Rotate the purge valve one-half turn clockwise to its fully closed position (the pointer on the knob points up). Air
flow from regulator stops.
3 Push in and rotate the cylinder valve knob clockwise to close the valve.
4 When the cylinder valve is fully closed, open the purge valve slightly to vent residual air pressure from system. As
the residual air pressure vents from the system, the remote pressure gauge needle will swing from full toward
empty.
5 Observe the air supply indicator lights of the HUD and verify that they light properly in descending order.
6 When the gauge needle crosses the one-third mark but before it reaches the beginning of the red empty band,
close the purge valve. See
Confirm that the following occur:
•
The Vibralert end-of-service indicator alarm
sounds (rapid clicking).
•
The red light at the far left of the HUD flashes
at 10 times per second.
•
On units equipped with a PASS device, the
gauge light on the remote pressure gauge is
solid red.
WARNING
If any of the end-of service indicators do not operate as described, do not use the respirator. Remove the
respirator from service and tag it for repair by authorized personnel. Use of a respirator with malfunctioning
end-of-service indicators may result in serious injury or death.
7 After verifying that all alarms are functioning, open the purge valve slightly to vent the remaining residual air
pressure from the system. All alarms (except the accessory electronic end-of-service time indicator) stop when
the system pressure drops to zero.
20
Figure 1-8.
To test the HUD,
control the needle
between 1/3 and
empty.
Figure 1-8 Remote pressure gauge
P/N 595360-01 Rev G 202004